Nut-lock.



PATBNTED APR. 16, 1907.

'A fr0/mers UNITED sTATEs PATENT OEEIOE.

GEORGE WASHINGTON ROBERTS F MINERSVILLE, PENNSYLVANIA.

NUT-LOCK.

Specification of 4Letters Patent.

Patented April 16,1907.

Application filed November 12, 1906. Serial No. 342,983.

To all whom ijn/(ry concern:

'Be it known that I, GEORGE WASHINGTON ROBERTS, a citizen of the United States, and a resident of Millersville, in the county of Schuylkill and State of Pennsylvania', have invented a new and Improved Nut-Lock, of

which the 'following is a full, clear, andV exact description.

The object of the invention is to provide a new and improved nut-lock for securely locking the nut in place after it is screwed up and lto allow convenient unscrewing of the nut wheneverlit is desired to do so and without destroying any of' the. parts, thus permitting free use of the bolt, nut, and lock.

The invention consists of novel features,

and parts and combinations of the same, which will be more fullydescribed hereinafter and then pointed out in the claim.

A practical embodiment of thel invention is represented in the accompanying drawings, forming a part of this specification, in Which similar'characters of reference indicate corresponding parts in all the views,

Figure 1 is an end view of the improvement as applied. Fig. 2 is a like view of the l same, showing the retaining-cover removed.

` Fig. 3 is a longitudinal sectional elevation of the same onthe line 3 3 of Fig. 1. Fig. 4 is a 'er'spective view ofthe locking member, and

i .5is a similar Yview of the nut.'

he nut A, ofsqnare, hexagonal, vor other shape, screws on the threaded end B of the bolt B, and in the outer face of the nut -A is formed a recess A for the reception or a locking member C, employed for holding the nut A against turni-ng after the nut is screwed #u on the threaded end B ofthe bolt B.

T e recess A is Jformed at diametrically opposite'points with enlargements A2- and A3,

and the wall of the recess A between the said enlargements A2 A3 is formed wi-thteeth A4,

into which mesh the teeth C of the locking member C, sundry of the said teethC also.

extending into the .enlargements A2 and A",

as plainly indicated in Fig. 2. The lockingl member C is provided with a central bore loosely fitting over the threaded end B of the bolt B, and the wallofthe said boreis providedwith a key C2, fitting acorrespondmgly-shaped keyway B2, arranged length- Iwise in the threaded end B of the bolt B.

In the nut-lock the nut A is first .screwed up on the .threaded endB of the bolt B to'nal position, and when this has been reached the locking member C is slipped 'over the. terminal of the threaded end B" bolt B owing to the key C2 engaging the keyway B2.

. In-'order to prevent the locking member C from accidentally dropping out of position, a retainingcover D is provided, preferably made of tin or other sheet metal and having oppositely disposed and outwardly extending integral lugs D D2, adapted to pass into the enlargements A2 A3 and through aperl tures A5 A to the outside of the nut A, the said apertures extending from the outer face of the nut into the said enlargements A2 A3, as is plainly indicated in Fig. 3. The lugs D D2 after being passed through the apertures A5 A6 are bent over, as indicated in Fig. 3, to hold the retaining-cover in position across the front of the locking. member C. The retanning-cover D is pro vided with a central. l

a erture or bore D3 sufficiently large to allow t e convenient passage of the terminal ofthe end B.

VThe nut-lockshown and described is very `simple in construction and is composed of 'but few parte,l not liable to easily get out of order.

In case it is desired to unscrew the nut A,

it is onlyl necessary for the operator to remove the retaining-cover D and then the locking member C to permit-turning of the nut A on the threaded end B of the bolt B.

The a ertures A5 A6 are sufficientlylarge to permitt e insertion of 'a screw-driver or other -tool for loosening the locking member C whenever it is desired to remove the same.

Having thus described my. invention, I claim as new and desire to secure by Letters Patent'-,`

In a nut-lock, the combination of a bolt having a keyway, la nut screwing on the saidl bolt and having its outer face provided with a recess having enlargements at diametrically opposite points and with apertures leading from the said enlargements, the wall of the recess between the said enlargements being formed with teeth, a lookin member having a smooth bore tting over tie end of the-bolt .and into the said nut-recess, the locking IIO member having a key for engagement With down upon the outside of said nut, the said the said keywa'y and theperlpheral face of retaining-cover having a Central aperture-forv .the said locking member )being provided withy the passage of the threaded end ofthe bolt. teeth, sundry of Which extend into the said In testimony whereof I have signed my 5 enlargements, and the remaining teeth meshname to this specification in the presence of I 5 ing with the lsaid teeth on the nut, and a retWo subscribing witnesses.

'taining-cover'for the said looking `member GEORGE WASHINGTON ROBERTS. and having its ends provided with lugs eX- Witnesses: tendin into the said enlargements and out Mrs. MICHAEL HINKLE,

c throng the apertures in the nut and bent WILLrAM E. ROBERTS. 

